html,
body,
#app {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

/* 默认自适性布局容器 */
.flex-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/*自适应内容区域 */
.scroll-container {
    flex: 1;
    overflow: auto;
    position: relative;
}